14 - 28
14. OPTIONS AND AUXILIARY EQUIPMENT
(2) Connection example
Servo amplifier
FR-BR resistor unit
MC
NFB
L
1
L
2
L
3
L
11
L
21
P
C
N
P/
N/
PR
HA
HB
HC
Alarm
output
PR
P
TH1
TH2
THS
Power
supply
3-phase
200 to
230VAC
No-fuse breaker
(Note 1)
(Note 1)
FR-BU brake unit
(Note 2)
P
1
P
2
(Note 3)
Note 1. Make up the external sequence to switch the power off when an alarm occurs or when the thermal relay is actuated.
2. When using servo amplifiers of 5kW and 7kW, always remove the lead of built-in regenerative resistor connected to P terminal
and C terminal.
3. Always connect P
1
-P
2
(For 11k to 22kW, connect P-P
1
). (Factory-wired.) When using the power factor improving DC reactor,
refer to section 14.11.
The cables between the servo amplifier and brake unit and between the resistor unit and brake unit
should be as short as possible. The cables longer than 5m should be twisted. If twisted, the cables must
not be longer than 10m.
The cable size should be equal to or larger than the recommended size. See the brake unit instruction
manual. You cannot connect one set of brake unit to two servo amplifiers or two sets of brake units to
one servo amplifier.
P
N
PR
P
N
P
P
PR
P
PR
PR
P
P
N
P
N
Servo amplifier
Servo amplifier
Brake unit
Resistor unit
5m
or less
5m
or less
10m
or less
10m
or less
Brake unit
Twist.
Twist.
Resistor unit
Summary of Contents for MELSERVO MR-J3-xT
Page 22: ...8 MEMO ...
Page 156: ...4 46 4 SIGNALS AND WIRING MEMO ...
Page 276: ...7 26 7 MR Configurator MEMO ...
Page 324: ...10 16 10 SPECIAL ADJUSTMENT FUNCTIONS MEMO ...
Page 418: ...14 66 14 OPTIONS AND AUXILIARY EQUIPMENT MEMO ...